CAJ | 학술논문

目的：探讨AngleⅡ类1分类错牙合畸形患者矫治前拔牙与否的形态学差异。方法选择临床获得满意疗效的恒牙早期120例AngleⅡ类1分类错牙合畸形的病例，其中未拔牙组42例，拔牙组78例，对其矫治前的x线头颅侧位定位片进行软硬组织和牙牙合模型的回顾性比较研究。结果两组矫治前形态学上的差异主要表现在：①硬组织：SNB、ANB、NA-PA、Npg-FH、Go-Pog、Ptm-s、FMIA、U1-L1、U1-Apgmm。②软组织：上唇厚度、下唇长度、颏唇沟厚度。③牙牙合模型：上下颌拥挤度、Spee氏曲线曲度、覆盖、上颌中后段宽、下颌中后段宽、上颌中段长。结论下颌的后缩程度、上前牙的突度、上唇厚度及牙列的拥挤度是决定拔牙与否的重要因素。
목적：탐토AngleⅡ류1분류착아합기형환자교치전발아여부적형태학차이。방법선택림상획득만의료효적항아조기120례AngleⅡ류1분류착아합기형적병례，기중미발아조42례，발아조78례，대기교치전적x선두로측위정위편진행연경조직화아아합모형적회고성비교연구。결과량조교치전형태학상적차이주요표현재：①경조직：SNB、ANB、NA-PA、Npg-FH、Go-Pog、Ptm-s、FMIA、U1-L1、U1-Apgmm。②연조직：상진후도、하진장도、해진구후도。③아아합모형：상하합옹제도、Spee씨곡선곡도、복개、상합중후단관、하합중후단관、상합중단장。결론하합적후축정도、상전아적돌도、상진후도급아렬적옹제도시결정발아여부적중요인소。
Objective To investigate the morphologic dif erence which has influenced on extraction decision in ClassII,Division 1 malocclusion. Methods 120 greatly improved Class IIdivision 1 malocclusion cases in early permanent were chosen.78 cases were treated with extraction and 42 were treated with nonextraction. Lateral cephalometric radiographs and models were taken before treatment for the retrospective study. Results The significant dif erent items between extraction and nonextraction in morphology were found in ①hard-tissue:SNB, ANB, NA-PA, Npg-FH, Go-Pog, Ptm-S, FMIA, U1-L1 and U1-Apgmm.②soft-tissue:upper lip thickness, the length of the lower lip and chin-lip groove thickness.③models:the tooth crowd degree, the depth of Spee curve, overjet, the width of maxil ary and mandibular middle and posterior arch and the length of maxil ary middle arch. Conclusion The results showed that the retraction of the mandible, the protrusion of the maxil ary incisor, the upper lip thickness and the tooth crowd degree were the keys to decide weather extraction or not.